CN221251418U

CN221251418U - Signal steering gear with automatic limiting function

Info

Publication number: CN221251418U
Application number: CN202322919525.2U
Authority: CN
Inventors: 彭旭; 汤池; 杨才锋; 彭兵; 黎伟
Original assignee: Hunan Fuli Rongyao Technology Co ltd; Hunan Fuli Technology Co ltd
Current assignee: Hunan Fuli Rongyao Technology Co ltd; Hunan Fuli Technology Co ltd
Filing date: 2023-10-30
Publication date: 2024-07-02
Anticipated expiration: 2033-10-30

Abstract

The utility model discloses a signal steering gear with an automatic limiting function, which comprises a steering gear shell, a limiting seat, a bearing seat, a connecting shaft, a driving shaft, a limiting plate, a speed reducer, a magnet mounting seat, a magnet and a PCB (printed circuit board), wherein a spiral line groove is formed in the limiting seat; the bearing seat is positioned at the top of the steering gear shell, the driving shaft is pivoted with the bearing seat, the connecting shaft is connected with the driving shaft, the limiting plate is rotationally and slidably connected with the connecting shaft, the input shaft and the output shaft of the speed reducer are respectively connected with the connecting shaft and the magnet mounting seat, the magnet is arranged on the magnet mounting seat, and the PCB is fixedly arranged on the PCB mounting seat. According to the signal steering gear disclosed by the utility model, external multi-turn rotary power is transmitted to the speed reducer through the shaft, the multi-turn rotary motion is converted into single-turn internal rotation through the conversion of the speed reducer, and then the mechanical rotary motion is converted into electric signal output through the relative rotary motion of the magnet and the PCB, so that the number of turns of the steering wheel is limited, and the limiting effect is achieved.

Description

Signal steering gear with automatic limiting function

Technical Field

The utility model relates to the technical field of steering gears, in particular to a signal steering gear with an automatic limiting function.

Background

In recent years, unmanned technology has been widely applied to specific engineering equipment and special vehicles (such as sanitation, agricultural machinery, mining vehicles and the like), and full-drive-by-wire technology has also been more widely applied. However, for special equipment or vehicles, a man-machine driving mode is still required to be reserved, namely, the man-machine driving is realized so as to realize the full coverage of the equipment or the vehicles in special occasions and working conditions.

The existing full-steer-by-wire has the advantages of quick response, high precision, simple installation and arrangement and the like, but the existing full-steer-by-wire has no mechanical or other interfaces, so that the existing full-steer-by-wire can only generally respond to electric signal instructions; or because of the limitation of the space or the position of the whole vehicle, the mechanical connecting rod transmission arrangement is very complex and difficult to realize the connection with the steering wheel of the cab. In addition, encoders or potentiometers and the like are used as steering command signal devices in the current market, but the steering command signal devices have no operation torque feedback and no automatic centering function, and the operation torque is small (light), so that the equipment and the vehicle have poor operation experience, and even the steering wheel swings along with the vibration or the swinging of the vehicle body due to the small operation torque, so that the safety risk exists. And because of the limitations of devices such as an encoder, a potentiometer and the like, the position of the device or the vehicle, which is turned on by the wire, needs to be recalibrated after the device or the vehicle is electrified every time, so that the program is complex, and the potential safety hazard is increased.

Disclosure of utility model

The utility model aims to provide a signal steering gear with an automatic limiting function, so as to solve the problems in the background technology.

In order to achieve the above purpose, the utility model provides a signal steering gear with an automatic limiting function, which comprises a steering gear shell, wherein a limiting seat is arranged in the steering gear shell, and a spiral line groove with a spiral line is formed in the limiting seat; the top of the steering gear shell is provided with a bearing seat, the bearing seat is rotationally connected with a driving shaft through a bearing, one end of the driving shaft penetrates through the bearing seat and is in transmission connection with a connecting shaft positioned in the steering gear shell, the connecting shaft is rotationally and slidingly connected with a limiting plate, one end of the limiting plate penetrates through the connecting shaft, the other end of the limiting plate is provided with a limiting slide block, and the limiting slide block can slide in the spiral line groove under the drive of the limiting plate; the connecting shaft penetrates through the limiting seat and is connected with an input shaft of the speed reducer, an output shaft of the speed reducer is connected with a magnet mounting seat through a coupler, and a magnet is arranged on the magnet mounting seat and at one side far away from the coupler; the steering gear is characterized in that a PCB (printed circuit board) positioned on one side of the magnet is further arranged in the steering gear shell, the PCB is fixedly installed on a PCB installation seat, and the PCB installation seat is fixedly installed on the steering gear shell.

Further, the top surface of the limit seat is connected with the bottom surface of the bearing seat, an installation groove is formed in the top surface of the limit seat, the limit plate is arranged in the installation groove, a spiral line groove is formed in the bottom surface of the installation groove, and the central line of the spiral line groove is an equidistant spiral line.

Further, the lower end of the driving shaft is sleeved in a bearing of the bearing seat, a bearing pressing plate is sleeved on the driving shaft, and the bearing pressing plate is fixedly connected with the bearing seat through a bolt.

Further, the upper end of the connecting shaft is sleeved in the bearing of the bearing seat; an axial through hole is formed in the connecting shaft and is connected with the upper end of the input shaft of the speed reducer.

Further, the connecting shaft is provided with a radial through hole, and the radial through hole penetrates through the side wall of the axial through hole along the radial direction of the connecting shaft so as to be communicated with the axial through hole; the limiting plate is movably arranged in the radial through hole in a penetrating mode.

Further, the cross section of the spiral line groove is rectangular, semicircular or U-shaped.

Further, the bearing seat is fixedly connected with the steering gear shell through bolts.

Compared with the prior art, the utility model has the following beneficial effects:

According to the signal steering gear with the automatic limiting function, external multi-turn rotating power is transmitted to the speed reducer through the shaft, the multi-turn rotating motion is converted into single-turn inner rotation through the conversion of the speed reducer, the mechanical rotating motion is converted into electric signals to be output through the relative rotating motion of the magnet and the PCB, and the number of turns of the steering wheel is limited by limiting the number of turns of the shaft through the limiting seat, so that the limiting function is realized; the utility model is applied to the engineering-level linear chassis, so that the steering wheel has a limiting function. The signal steering gear with the automatic limiting function has high IP56 protection performance; the angle signal adopts a non-contact magnetic induction technology, has no abrasion, is maintenance-free and has high reliability.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The utility model will be described in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of a longitudinal cross-sectional structure of a signal steering gear with automatic limiting function along its length direction according to the present utility model;

FIG. 2 is a schematic view of a longitudinal cross-sectional structure of a signal steering gear with an automatic limit function along a width direction thereof according to the present utility model;

FIG. 3 is a schematic view of the internal (top view) structure of a signal steering gear with automatic limiting function according to the present utility model;

The device comprises a 1-limit seat, a 1.1-spiral line groove, a 1.2-mounting groove, a 2-limit plate, a 2.1-limit sliding block, a 3-bearing pressing plate, a 4-connecting shaft, a 5-driving shaft, a 6-speed reducer, a 7-bearing seat, an 8-coupling, a 9-magnet mounting seat, a 10-magnet, an 11-PCB, a 12-PCB mounting seat and a 13-steering gear shell.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawings, but the utility model can be implemented in a number of different ways, which are defined and covered by the claims.

Referring to fig. 1 to 3, the present embodiment provides a signal steering gear with an automatic limiting function, which includes a limiting seat 1, a limiting plate 2, a bearing pressing plate 3, a connecting shaft 4, a driving shaft 5, a speed reducer 6, a bearing seat 7, a coupling 8, a magnet mounting seat 9, a magnet 10, a PCB board 11, a PCB board mounting seat 12 and a steering gear housing 13; the specific structure is as follows:

The limit seat 1 is arranged in the steering gear shell 13, and the limit seat 1 is provided with a spiral line groove 1.1 with a downward concave central line in a spiral line shape. The bearing pedestal 7 is fixedly arranged at the top of the steering gear shell 13 through bolts, the driving shaft 5 is rotatably connected to the bearing pedestal 7, and the lower end of the driving shaft 5 is arranged in a bearing of the bearing pedestal 7 and is in transmission connection with the connecting shaft 4 positioned in the steering gear shell 13. The bearing pressing plate 3 is sleeved on the moving shaft 5, and the bearing pressing plate 3 is fixedly connected with the bearing seat 7 through bolts. The upper end of the connecting shaft 4 is sleeved in a bearing of the bearing seat 7, and the connecting shaft 4 is provided with an axial through hole; the connecting shaft 4 is rotationally and slidingly connected with the limiting plate 2, one end of the limiting plate 2 penetrates through the connecting shaft 4, the other end of the limiting plate 2 is fixedly provided with a limiting slide block 2.1, and the limiting slide block 2.1 can slide in the spiral line groove 1.1 under the drive of the limiting plate 2; specifically, the connecting shaft 4 is provided with a radial through hole penetrating through a side wall of the axial through hole in the radial direction of the connecting shaft 4 so as to communicate with the axial through hole; the limiting plate 2 is arranged in the radial through hole in a sliding and penetrating way. The other end of the connecting shaft 4 rotates to penetrate through the limiting seat 1 and is connected with an input shaft of the speed reducer 6, an output shaft of the speed reducer 6 is connected with a magnet mounting seat 9 through a coupler 8, and a magnet 10 is arranged on the magnet mounting seat 9 and on one side far away from the coupler 8. The steering gear shell 13 is internally provided with a PCB 11 positioned on one side of the magnet 10, the PCB 11 is fixedly arranged on a PCB mounting seat 12, and the PCB mounting seat 12 is fixedly arranged on the steering gear shell. Specifically, the PCB board and the magnet are arranged in a non-contact way, the gap between the magnet and the PCB board is 1-3 mm, and the center of the shaft is aligned. When the magnet and the PCB rotate relatively, the angle detection is carried out by adopting a Giant Magnetoresistance (GMR) principle under the action of a rotating magnetic field, so that cosine signals and sine signals are generated under the action of the rotating magnetic field read by an induction chip on the PCB, and the PCB MCU carries out arithmetic processing such as arctangent and the like and then converts and outputs the electric signals.

In a specific embodiment, the driving shaft 5 is connected with the steering wheel, the driving shaft 5 and the connecting shaft 4 are driven to rotate by the steering wheel, and the limiting plate 2 is driven to rotate by the connecting shaft 4, so that the limiting slide block 2.1 is driven to slide in the spiral line groove 1.1 of the limiting seat 1 (meanwhile, the sliding of the limiting slide block drives the limiting plate to slide along the radial through hole). After the limit sliding blocks 2.1 slide to the first end and the last end of the spiral line groove 1.1, a limit function is achieved, namely, when the driving shaft 5 rotates for a certain number of turns under the drive of the steering wheel, the limit seat 1 limits the rotation of the driving shaft 5, and therefore the number of turns of the steering wheel is limited. The connecting shaft 4 is connected with the input shaft of the speed reducer 6, the output shaft of the speed reducer 6 is connected with the magnet mounting seat 9 through the coupler 8, the speed reducer 6 converts multiple rotations of the driving shaft 5 into rotations in a single circle, the magnet 10 is mounted on the magnet mounting seat 9, the PCB 11 is fixed on the PCB mounting seat 12, the PCB mounting seat 12 is fixedly mounted on the 13 steering gear shell, so that the PCB 11 is fixed, the rotating magnet 9 and the fixed PCB 11 move relatively, the angle of the relative rotation is converted into an electric signal to be output to the controller, the relative angle range of the magnet 10 and the PCB 11 corresponds to the angle of the rotation when the tire turns, the magnet 10 and the PCB 11 rotate relatively, the controller outputs signals to the PCB, and then outputs signals corresponding to the angle to control the turning of the tire after receiving the signals, so that the chassis turning is realized.

In a specific embodiment, the top surface of the limit seat 1 is connected with the bottom surface of the bearing seat 7, the top surface of the limit seat is provided with an installation groove 1.2, the limit plate 2 is arranged in the installation groove 1.2, the bottom surface of the installation groove is provided with a spiral line groove 1.1, the central line of the spiral line groove is an equidistant spiral line, but the starting point of the spiral line groove is positioned outside the projection range of the connecting shaft on the limit seat 1; in particular, the spiral groove may be provided in 3 turns. The cross section of the spiral groove 1.1 may be rectangular, semicircular or U-shaped.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The signal steering gear with the automatic limiting function is characterized by comprising a steering gear shell (13), wherein a limiting seat (1) is arranged in the steering gear shell (13), and a spiral line groove (1.1) with a spiral line shape is formed in the limiting seat (1); the top of the steering gear shell (13) is provided with a bearing seat (7), the bearing seat (7) is rotationally connected with a driving shaft (5) through a bearing, one end of the driving shaft (5) penetrates through the bearing seat (7) and is in transmission connection with a connecting shaft (4) positioned in the steering gear shell (13), the connecting shaft (4) is rotationally and slidingly connected with a limiting plate (2), one end of the limiting plate (2) penetrates through the connecting shaft (4), the other end of the limiting plate (2) is provided with a limiting slide block (2.1), and the limiting slide block (2.1) can slide in the spiral line groove (1.1) under the driving of the limiting plate (2); the connecting shaft (4) penetrates through the limiting seat (1) and is connected with an input shaft of the speed reducer (6), an output shaft of the speed reducer (6) is connected with a magnet mounting seat (9) through a coupler (8), and a magnet (10) is arranged on the magnet mounting seat (9) and at one side far away from the coupler (8); the steering gear is characterized in that a PCB (11) positioned on one side of the magnet (10) is further arranged in the steering gear shell (13), the PCB (11) is fixedly installed on a PCB installation seat (12), and the PCB installation seat (12) is fixedly installed on the steering gear shell.

2. The signal steering gear according to claim 1, wherein the top surface of the limit seat (1) is connected with the bottom surface of the bearing seat (7), an installation groove (1.2) is formed in the top surface of the limit seat, the limit plate (2) is arranged in the installation groove (1.2), a spiral line groove (1.1) is formed in the bottom surface of the installation groove, and the center line of the spiral line groove is an equidistant spiral line.

3. The signal steering gear according to claim 1, wherein the lower end of the driving shaft (5) is sleeved in a bearing of the bearing seat (7), the driving shaft (5) is sleeved with a bearing pressing plate (3), and the bearing pressing plate (3) is fixedly connected with the bearing seat (7) through a bolt.

4. The signal steering gear according to claim 1, characterized in that the upper end of the connecting shaft (4) is sleeved in a bearing of the bearing seat (7); an axial through hole is formed in the connecting shaft (4) and is connected with the upper end of the input shaft of the speed reducer (6).

5. Signal diverter according to claim 4, characterized in that the connecting shaft (4) is provided with a radial through hole penetrating the side wall of the axial through hole in the radial direction of the connecting shaft (4) to communicate with the axial through hole; the limiting plate (2) is movably arranged in the radial through hole in a penetrating mode.

6. A signal diverter as claimed in claim 1, characterized in that the spiral wire groove (1.1) is rectangular, semicircular or U-shaped in cross section.

7. Signal steering gear according to claim 1, characterized in that the bearing housing (7) is fixedly connected to the steering gear housing (13) by means of bolts.